console.log(Ice.getExtension(null));
console.log(Ice.getExtension(""));
console.log(Ice.getExtension("abc"));
console.log(Ice.getExtension("abc.txt"));
console.log(Ice.getExtension("abc/def.cpp"));
console.log(Ice.getExtension("abc.xyz/def.css"));
console.log("======================");
console.log(Ice.getExtension("nm/abc.xyz/def.css"));
console.log(Ice.getExtension("nm/abc.xyz/def"));
console.log(Ice.getExtension("nm/abcxyz/def"));
